5				3
		3	2				1
4
	6	5
					3	2
							7
2				5	4
			1				3

Difficulty: Medium (0)

	8
6	5			4
				5
5			6	1	4
		3	5	7			2
			2
			7			1	6
						5

Difficulty: Very easy (0)

		1			6	4
	7					8
	8				3
					8
		4
		5				7
	1					5
	3	7			1

Difficulty: Easy (0)

	1			8	5
							5
5	8		3		7
		4		1		7	6
6
		2	6			5

Difficulty: Easy (0)